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Finding the Fourth Proportional to 461.19, 636.10 and 321.32

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Solution

The fourth proportional to 461.19, 636.10 and 321.32 is: 443.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.19 : 636.10 = 321.32 : x
  2. Step 2: Convert to fraction form
    461.19/636.10 = 321.32/x
  3. Step 3: Cross multiply
    461.19x = 636.10 × 321.32
  4. Step 4: Simplify right side
    461.19x = 204,387.67
  5. Step 5: Solve for x
    x = 204,387.67/461.19
  6. Step 6: Final answer
    x = 443.17

Related Problems

Find fourth proportional to 230.60, 318.05 and 160.66
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.